To create a tree based on molecular information, we obtained a __________ sequence from NCBI, used _____________ to align the sequences, input the aligned sequences into ________ to obtain the raw phylogenetic tree and rooted the tree using ______________.
A. FASTA, DNAPars, MUSCLE, FigTree
B. MUSCLE, FASTA, DNAPars, FigTree
C. FASTA, MUSCLE, DNAPars, FigTree
D. FigTree, GenBank, MUSCLE, FASTA
Ans: C. FASTA, MUSCLE, DNAPars, FigTree
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The atmosphere and seas of the early Earth lacked oxygen. What kind of organisms could NOT have lived under those conditions?
A. obligate aerobes B. obligate anaerobes C. cyanobacteria D. chemoautotrophs E. All of the other choices are correct.
Some lichens can reach ages of at least
A. 2 years. B. 10 years. C. 100 years. D. 450 years. E. 4,500 years.
During the Carboniferous Period, the competitive
edge was held by plants a. with well-developed gametophytes. b. with cuticles. c. with lignin-reinforced tissues. d. with underground stems. e. that produced seeds.
A fungus was infecting a farmer's crops, killing many of the plants. The farmer decided to use a chemical to kill the fungus. However, he discovered that in another country, farmers control this fungus by releasing insects to kill it. In that country, the population of the released insects is kept under control naturally by a local bird that preys on the insects. The farmer decided to order some of the insects to release in his fields. How might the release of these insects be harmful to the local ecosystem?
A) The insect may increase crop yields by contributing to the spread of the fungus. B) The insect may alter the food web by providing an additional food source to birds. C) The insect may become an invasive species if it has no natural predators. D) The insect may cause crop prices to decrease by increasing the crop yields.